Graf’s new tank generation of Carat rainwater underground tanks has been specially developed for rainwater harvesting. Put simply, rainwater harvesting is collecting the rainwater that falls onto the roof of a building (either a home or a commercial building) and then capturing it inside a tank, which can be located either above or below ground.

The Graf Garden Comfort system is designed for irrigation and outside cleaning purposes. Rainwater is collected from the roof of the property and is fed into the underground tank via the downpipes.

Graf Carat Rainwater Harvester Process

• Water passes through a filter, which varies in size depending on the surface area of the roof that the rainwater is being collected from, which keeps all leaves, moss and debris that may be travelling with the rainwater out of the tank.
• Once the rainwater is held within the tank, it is then extracted for use.
• If the rainwater tank is above ground, then the rainwater can simply be taken out of the tank via a tap – as would be the case in a simple water butt.
• If the rainwater is being stored in a tank underground, then it must be extracted out of the tank using a pump. There are many types of pumps for different applications.
• Depending on what the harvested rainwater is being used for, there may also be a requirement for a mains water backup function for periods where little rainwater is collected.

Features & Benefits

• Lightweight, easy to transport
• Easy and safe assembly
• EPDM to profile sealings, lasts more than 25 years
• Consistent quality due to constant production monitoring
• Suitable for vehicle loading (when combined with the Telescopic cast iron cover)
• 2 additional hose-lock connection extraction points